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Should use Controller Argument
function view($post_id) {
...
}
or uri->segment
function view() {
...
$post_id = $this->uri->segment(3);
...
}
Just for simple blog post ID. Is there a difference?
I would use the controller argument.
Then if you ever had to move the code and put it in a sub-directory it would still work, where as the segment method would not.